/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.flink.metrics.otel;

import org.junit.jupiter.api.Assertions;
import org.junit.jupiter.api.Test;

/** Unit tests for {@link VariableNameUtil}. */
class VariableNameUtilTest {

    @Test
    void getVariableName() {
        Assertions.assertEquals("t", VariableNameUtil.getVariableName("<t>"));
        Assertions.assertEquals("<t", VariableNameUtil.getVariableName("<t"));
        Assertions.assertEquals("t>", VariableNameUtil.getVariableName("t>"));
        Assertions.assertEquals("<", VariableNameUtil.getVariableName("<"));
        Assertions.assertEquals(">", VariableNameUtil.getVariableName(">"));
        Assertions.assertEquals("", VariableNameUtil.getVariableName("<>"));
        Assertions.assertEquals("", VariableNameUtil.getVariableName(""));
    }
}
